ML19247B817
| ML19247B817 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 08/01/1979 |
| From: | Rubenstein L Office of Nuclear Reactor Regulation |
| To: | Parker W DUKE POWER CO. |
| References | |
| NUDOCS 7908130559 | |
| Download: ML19247B817 (4) | |
Text
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August 1,1979 Docket No. : 50-413/414 Mr. William 0. Parker Vice President, Steam Production Duke Power Company P. O. Box 33189 Charlotte, North Carolina 28242
Dear Mr. Parker:
SUBJECT:
SECONDARY WATER CHEMISTRY CONTROL (Catawba)
In late 1975 we incorporated provisions into the Standard Technical Specifi-cations (STS) that required limiting conditions for operation and surveillance requirements for secondary water chemistry parameters.
The proposed Technical Specifications for your plant (s), as well as for other Pressurized Water Plants that have been issued an Operating License since 1974 or are now under review for an Operating License, contain either these provisions or a requirement to establish these provisions after baseline chemistry conditions nave been determ ined. The intent of the provisions was to provide added assurance that the operators of newly licensed plants would properly monitor and control secondary water chemistry to limit corrosion of steam generator tubes.
In a nur.ber of instances the Technic' Specifications have significantly restricted the operational flexibili'.y of some plants with little or no benefit with regard to 1initing corrosion of steam generator tubes.
Based on this experience and the knowledge gained in recent years, we have concluded that Technical Specification limits are not the most effective way of assuring that steam generator tube corrosion will be minimized.
Due to the complexity of the corrosion phenomena involved and the state-of-the-art as it exists today, we believe that, in lieu of Technical Specifications, a more effective approach would be to institute a license condition that requires the implementation of a secondary water chemistry monitoring and control program containing appropriate procedures and adinin-istrative controls.
The required program and procedures would be developed by the licensee (or applicant) with any needed input from their reactor vendors or other consultants, and thus could more readily account for site and plant-specific factors that affect chemistry conditions in the steam generators.
In our view, plant operation following such procedures would provide assurance that licensees would devote proper attention to controlling secondary water chemistry, while also providing the needed flexibility to allow them to deal more effectively with any of f-normal conditions that might arise.
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Mr. William 0. Parker August 1,1979 Consequently, we request that you submit within 60 days your proposed secondary water chemistry program which will be referenced in a condition to your operating license and will replace any proposed Technical Specifications on secondary water chemistry. A model license condition is enclosed. We have concl uded that such a license condition, in conjunction with existing Technical Specifications on steam generator tube leakage and inservice inspectica, would provide the most practical and comprehensive means of assuring that steam generator tube integrity would be maintained.
If you have any questions, please contact us.
Si ncerely, O c$ ~ 9 7. 9 VZ-r w fer L. S. Rubenstein, Acting Chief Light Water Reactors Branch No. 4 Division of Project Management Encl osu re :
Model License Condition cc w/ enclosure:
See next page
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Duke Power Company ccs:
Willian L. Porter, Esq.
Duke Power Company P. O. Box 33189 Charlotte, North Carolina 28242 J. Michael McGarry III, Esq.
Debevoise & Liberman 1200 Seventeenth Street, N. W.
Washington, D. C.
20036 NCMPA-1 222 Nerth Person Street Suite 208 Raleigh, North Carolina 27601 Mr. R. S. Howard Power Systems Division Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 Mr. C. W. Woods NUS Corporation 2536 Countryside Boulevard Clearwater, Florida 33515 Mr. Jesse L. Riley, President Carolina Environmental Study Group 854 Henley Place Charlotte, North Carolina 28208 Richard P. Wilson, Esq.
Assistant Attorney General S.C. Attorney General's Office P. O. Box 11549 Colurbia, South Carolina 29211 Walton J. McLeod, Jr., Esq.
General Counsel South Carolina State Board of Health J. Marion Sims Building 2600 Bull Street Columbia, South Carolina 29201 James W. Burch, Director Nuclear Advisory Ccunsel 2600 Bull Street Columbia, South Carolina 29201
ENCLOSURE F0 DEL LICENSE CONDITION SECONDARY W4TER CHEPCSTRY PONITORING The licensee shall knplement a secondary water chemistry monitoring program in accordance with ( reference Licensee's Procedure) to inhibit steam generator tube degradation.
This program incl udes:
1.
Identification of a sanpling schedule for the critical parameters and of control points for these parameters; 2.
Identification of the procedures used to measure the value of the critical par ameters ;
3.
Identification of process senpling points; 4.
Procedure for the recording and management of data; 5.
Procedures defining corrective actions for off-control point chemistry conditions; and 6.
A procedure identifying (1) the authority responsible for the interpretation of the data and (2) the sequence and timing of administrative events required to initiate corrective action.
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